Method for performing a switch of at least one switching device of a running device and drive system for at least one switching device of a running device

Abstract

A method for performing a switching of a running device (20) is disclosed. The running device (20) comprises at least one first switching device (17), which can be a load tap changer, and / or at least one second switching device (18), which can be a bidirectional commutator. Furthermore, a drive system (3) for the at least first and second switching devices (17, 18) of the running device (20) is disclosed. Each of the first switching devices (17) and each of the second switching devices (18) is equipped with its own electric motor (12, 13), which is connected to the first switching device (17) and to any of the second switching devices (18) by means of a drive shaft (16). At least one parameter can be obtained for the first switching devices (17) and for each of the second switching devices (18) by means of a respective feedback system (6, 7) associated with the first motor (12) and with each of the second motors (13). The obtained parameters determine a blocking condition for the first switching devices (17) and for the second switching devices (18).

Description

Technical Field

[0001] The present invention relates to a method for performing switching of at least one switching device of an operating device.

[0002] Furthermore, the present invention relates to a drive system for at least one switching device for operating equipment. Background Technology

[0003] German patent publication DE 102014110732 A1 discloses an on-load tap changer with a motor drive for switching between winding taps of a tap changer transformer. The motor drive drives a drive shaft. Rotational movement of the switch motor drive is provided by two switchable coupling devices: a first drive shaft mated to a selector and a second drive shaft mated to a load changer. The selector and load changer can be configured to be connected to each other independently of the introduced rotational movement of the motor drive.

[0004] Voltage regulation in energy transmission and distribution networks requires embedding different types of switches within transformers. During transformer operation, various factors, and therefore the switches, all play crucial roles. Thus, in a transformer with two embedded on-load tap changers, the operation of the two on-load tap changers needs to be coordinated. This is achieved by means of a rigid linkage between the two on-load tap changers, driven by a common motor. Incorrect engagement of the linkage can lead to malfunctions during operation, and in extreme cases, this can result in significant technical and economic consequences. Summary of the Invention

[0005] Therefore, the object of the present invention is to provide a method for performing the switching of at least one switching device of an operating device, thereby improving the safety and reliability of the switching device and the operating device.

[0006] The objective is achieved by a method for performing a switching of operating devices, the method comprising the features described in this invention.

[0007] Another objective is to provide a better solution for the drive system of switching devices, thereby improving the safety of switching and operating devices.

[0008] Another object of the present invention is to provide a drive system for at least one switching device for operating equipment, thereby improving the safety and reliability of switching and operating equipment during the switching process.

[0009] The above objective is achieved by a drive system for at least one switching device used to operate the device, the drive system including the features described in this invention.

[0010] This invention relates to a method for switching at least one switching device for performing at least one operating device, wherein the operating device is a transformer, and the switching device is an on-load tap changer or a bidirectional commutator, characterized by the following steps:

[0011] - The control unit receives the switching signal.

[0012] - The control unit selects at least one switching device for switching based on the switching signal;

[0013] - Check the corresponding interlocking conditions for the selected at least one switching device based on at least one parameter; and

[0014] When the corresponding interlocking conditions are met, the switching is performed by means of the corresponding motor of the selected at least one switching device.

[0015] Wherein, the at least one parameter includes the position and / or motion state of the selected at least one switching device, and

[0016] The corresponding locking condition based on the at least one parameter defines whether the corresponding switch is locked, such that the switch can occur when the locking condition is met.

[0017] The key feature of the method according to the invention for performing switching of at least one switching device matched with operating equipment is that a control unit or control device receives a switching signal. By means of the control unit, at least one of the switching devices is selected for switching. This is achieved based on the switching signal. At least one parameter is retrieved from a feedback system by the control unit. A feedback system may be matched with one motor of each switching device. The switching is performed by means of the selected switching device via a motor connected to the corresponding switching device via a drive shaft. Here, the switching is performed only when a corresponding locking condition is met for the selected switching device.

[0018] The switching signal can be generated, for example, through a voltage regulator, manually input, or in any other way. Here, the voltage regulator monitors voltage fluctuations in the network. As needed, it outputs a signal to the control unit, which then adjusts the voltage accordingly by manipulating the switching device.

[0019] The method according to the invention is based on the idea of ​​checking the interlocking conditions in a control unit or control device before manipulating or activating a switching device in operating equipment, such as a transformer, and performing a switch. For this check, parameters are retrieved. If the retrieved parameters satisfy the interlocking conditions, the switch is performed.

[0020] In a possible first embodiment of the method according to the invention, an on-load tap changer is assigned to the transformer as a first switching device and a bidirectional commutator as a second switching device. To perform the switching, a control unit operates power components matched with the transformer to operate the on-load tap changer or to operate both the on-load tap changer and the bidirectional commutator. Depending on the execution of the switching, a first motor connected to the on-load tap changer via a drive shaft and / or a second motor connected to the bidirectional commutator via a drive shaft are operated.

[0021] According to another possible embodiment of the method according to the invention, three on-load tap changers are provided for the transformer as first switching devices. To perform switching, a control unit operates a power component matched with the transformer to operate one of the three on-load tap changers. Depending on the execution of the switching, the power component operates a first motor of each on-load tap changer via a drive shaft connected to the on-load tap changer.

[0022] According to another possible embodiment of the method according to the invention, a transformer is assigned an on-load tap changer as a first switching device and two bidirectional commutators as a second switching device. To perform the switching, a power unit matched with the transformer is operated by a control unit to manipulate at least one of the on-load tap changer and the two bidirectional commutators. Depending on the execution of the switching, the power unit operates a first motor connected to the on-load tap changer via a drive shaft and a second motor connected to either of the two bidirectional commutators via a drive shaft.

[0023] According to the method of the invention, parameters obtained through a feedback system for switching at least one on-load tap changer and / or switching at least one bidirectional commutator can be used to determine the state or position of the corresponding on-load tap changer and the corresponding bidirectional commutator. Furthermore, the parameters obtained by the feedback system for the on-load tap changer and bidirectional commutator required for the switching indicate whether the on-load tap changer and / or bidirectional commutator is being operated.

[0024] According to the method of the invention, the retrieved parameters of at least one on-load tap changer and at least one bidirectional commutator are evaluated and summarized in the control unit. Based on the evaluation results, at least one on-load tap changer and / or at least one bidirectional commutator can be operated as needed. According to another design of the method of the invention, three transformers are provided. Each of the three transformers is assigned a power unit. Each power unit is controlled by a central control unit, wherein the on-load tap changers of each of the three transformers are combined into a first switching device group, the first bidirectional commutators of each of the three transformers are combined into a second switching device group, and the second bidirectional commutators of each of the three transformers are combined into a third switching device group.

[0025] In all embodiments of the method described herein according to the invention, the presence of the on-load tap changer and bidirectional commutator is checked by the control unit. The position of the on-load tap changer or bidirectional commutator is determined from the check. Thus, the parameter for the interlocking condition to be checked is the position of the on-load tap changer and / or bidirectional commutator obtained by means of a feedback system.

[0026] Feedback systems can be detectors, multi-rotor encoders, single-rotor encoders, converters, switches, microswitches, sensors, contacts, etc. It is obvious to those skilled in the art that the list of feedback system design schemes is not absolute.

[0027] The feedback system is used to determine the parameters needed to check the latching condition. These parameters are associated with the feedback system. Depending on the design, these parameters may include their values, ranges, and simple signals.

[0028] Where necessary, the feedback system retrieved by the control unit can also be coupled with a temperature regulator, protective switch, or the like. Thus, any arbitrary parameter retrieved through the feedback system can also be used for the latching condition. Therefore, for example, a determined temperature from a thermometer can be used as a parameter to satisfy the latching condition. Furthermore, parameters can be used based on the status of the power switch. In this case, the feedback system is a detector that provides parameters indicating whether the power switch is open, closed, just open, or closed. Corresponding to the latching condition, the status of the power switch is checked to determine whether the switching device to be operated can / is permitted to be operated. A key feature of the drive system according to the invention for at least one on-load tap changer and / or at least one bidirectional commutator for a transformer is a first motor connected to at least one on-load tap changer via a drive shaft. Each second motor is connected to at least one bidirectional commutator via a drive shaft. Each of the first motors and each of the second motors is equipped with a feedback system to obtain at least one parameter of at least one on-load tap changer and / or at least one bidirectional commutator. A control unit communicatively connected to the power unit can operate the on-load tap changer using the first motor and operate the bidirectional commutator using the second motor. The on-load tap changer and bidirectional commutator are operated only when a blocking condition determined by at least one obtained parameter is met. Alternatively, the parameters can be obtained from another feedback system, such as protective contacts or a thermometer, as an alternative to the parameters of the second feedback system on the second switching device.

[0029] According to one possible design of the drive system, the transformer is equipped with a single on-load tap changer and a single bidirectional commutator.

[0030] According to another possible design of the drive system, three on-load tap changers are provided for the transformer. The memory can store the specific switching state or position of the switching device, which, for example, matches the value used for the position of the drive shaft.

[0031] According to another design scheme for the drive system, the transformer is equipped with a single on-load tap changer and two bidirectional commutators.

[0032] According to another design scheme for the drive system, multiple transformers are equipped with the drive system. Each transformer is equipped with a power unit, and each power unit is communicatively connected to a single central control unit. The on-load tap changers of the multiple transformers are combined to form a first switching device group. The first bidirectional commutators of the multiple transformers are combined to form a second switching device group. The second bidirectional commutators of the multiple transformers are combined to form a third switching device group. Each motor can be assigned its own power unit. A single power unit can also drive all motors.

[0033] The control unit and / or power unit includes a memory. The memory can store determined switching states or positions of the switching device, such as values ​​corresponding to the positions of the drive shaft. Attached Figure Description

[0034] The invention and its advantages will now be explained in detail with reference to the accompanying drawings and embodiments, without limiting the invention to the embodiments shown. The dimensions in the drawings do not always correspond to actual dimensions, as some shapes are simplified, and other shapes are shown in a larger manner relative to other elements for better illustration.

[0035] Here it is shown:

[0036] Figure 1 A drive system for at least one switching device in a transformer is shown according to an embodiment of the present invention;

[0037] Figure 2 Another embodiment of a drive system for at least one switching device in a transformer is shown according to another embodiment of the present invention;

[0038] Figure 3 Another embodiment of a drive system for at least one switching device in a transformer is shown;

[0039] Figure 4 An implementation of a drive system for multiple transformers is shown; and

[0040] Figure 5A method flow for performing switching of at least one switching device in a transformer by means of a drive system according to the invention is shown. Detailed Implementation

[0041] The same reference numerals are used for the same or functionally identical elements of the invention. Furthermore, for visibility reasons, only the reference numerals necessary for describing the corresponding figures are shown in a single figure.

[0042] Figure 1 A transformer 20 for transmitting energy is shown. The transformer has a first switching device 17 configured as an on-load tap changer and a second switching device 18 configured as a bidirectional commutator. The on-load tap changer 17 is operated by means of a first motor 12. The first motor 12 has a drive shaft 16 connected to the on-load tap changer 17. Furthermore, a first feedback system 6 is provided for the first motor 12, through which the state of the on-load tap changer 17, specifically the tapped state, can be determined. The bidirectional commutator 18 is operated by a second motor 13. The second motor 13 is also connected to the bidirectional commutator 18 via the drive shaft 16. The second motor 13's own feedback system 7 enables the determination of the state of the bidirectional commutator 18, specifically the tapped state. A control unit 10 is connected to the first motor 12 and the second motor 13, and thus also to the feedback systems 6 and 7 of the on-load tap changer 17 and the bidirectional commutator 18. The control unit 10 receives signals for operating the on-load tap changer 17 and the bidirectional commutator 18. Furthermore, in the control unit 10, the different values ​​of the corresponding feedback systems 6 and 7 are evaluated and summarized. The control unit 10, motors 12 and 13, and feedback systems 6 and 7 form the drive system 3 for the on-load tap changer 17 and bidirectional commutator 18 of the transformer 20.

[0043] The control device 2 according to the invention includes a control unit 10 that receives a switching signal during operation. If, for example, the voltage in the power grid drops, the voltage must be adjusted, for example, by operating the on-load tap changer 17 of the transformer 20. By using the corresponding wiring of the bidirectional commutator 18 with the windings of the transformer 20 (not shown), the adjustment range or operating range of the transformer 20 is increased. After receiving a signal that the voltage must be changed, it is first determined whether the on-load tap changer 17 or the bidirectional commutator 18 must be operated, or both sequentially. After determining that the on-load tap changer 17 must be operated, the interlocking conditions defined between the bidirectional commutator 18 and the on-load tap changer 17 are checked. For example, when the bidirectional commutator 18 is being operated, the on-load tap changer 17 is not allowed to be operated. This check is performed such that the second feedback system 7 of the second motor 13 of the bidirectional commutator 18 reports the current status to the control unit 10 or transmits parameters to the control unit 10. At this time, the position or state of the bidirectional commutator 18 is determined and transmitted by the second feedback system 7. In addition, the second feedback system 7 reports whether the bidirectional commutator 18 is currently being operated. If the obtained parameters meet the locking conditions, the on-load tap changer 17 is operated. If the locking conditions are not met, the on-load tap changer 17 is not operated. Alternatively, the on-load tap changer 17 may be turned on or operated only when the locking conditions are met, i.e., when the bidirectional commutator 18 is in a defined position or no longer moving.

[0044] The control device 2 includes a control unit 10 having a memory 5 and at least one power component 11 having a memory 5. The memory 5 can store, for example, the correspondence between the switching states of an on-load tap changer 17 and a bidirectional commutator 18. Similarly, the memory 5 can store values ​​for the positions of some drive shafts 16.

[0045] Figure 2 The drive system 3 described above is shown for three identical on-load tap changers 17, each matched with a transformer 20. Each on-load tap changer 17 also has its own first motor 12 and its own first feedback system 6. Upon receiving a switching signal, it is first determined which of the three on-load tap changers 17 should be operated. Alternatively, the order in which the on-load tap changers 17 are operated can be selected. Here, a latching condition is also checked. This is achieved based on the parameters transmitted by the corresponding first feedback system 6. At this time, it is also checked which position the unoperated on-load tap changer 17 is in, or whether it has just been operated. If the obtained parameters satisfy the latching condition, the selected on-load tap changer 17 can be operated.

[0046] Figure 3Another embodiment of the described drive system 3 is shown. In this case, there is an on-load tap changer 17 and two bidirectional commutators 18 serving as second switching devices 18. The on-load tap changer 17 and the two bidirectional commutators 18 are respectively operated by their own first motor 12 and their own second motor 13. A first feedback system 6 or a second feedback system 7 is assigned to each of the motors 12 and 13. Here, different locking conditions are also checked in the control unit 10 by retrieving parameters of the feedback system 6 or 7. Therefore, in this embodiment, the second bidirectional commutator 18 can only be operated when the first bidirectional commutator 18 is in a safe position and the on-load tap changer 17 is in an intermediate state (not shown). As a safe position, a specific first state or second state of the bidirectional commutator 18 is defined.

[0047] Figure 4 Another embodiment of the described drive system 3 is shown. Here, three transformers 20 are shown. The embodiment described herein relates to phase shifters with longitudinal and lateral adjustments. Each transformer 20 has an on-load tap changer 17 (first switching device) and two bidirectional commutators 18 (second switching devices). The configuration of the transformers 20 corresponds to… Figure 3 The configuration of the implementation method is as follows. After receiving the switching signal, it is first checked which of the on-load tap changers 17 and / or each bidirectional commutator 18 must be operated. For this purpose, switching device groups 30, 40, and 50 can be formed. Thus, the first switching device group 30 consists of the on-load tap changers 17 in the corresponding transformer 20. The second switching device group 40 is the first bidirectional commutator 18. The third switching device group 50 is the corresponding second bidirectional commutator 18. Therefore, before operation, it is checked whether the determined switching device groups 30, 40, and 50 meet the blocking conditions. Here, for example, it is checked which position each individual first bidirectional commutator 18 is in and whether one of them is moving. The blocking conditions are checked according to the parameters of the corresponding feedback systems 6 and 7. One of the blocking conditions is that one of the switching device groups 40 and 50 can only be operated when the on-load tap changer 17 of the first switching device group 30 is in a so-called intermediate state (not shown). The power components 11 of each drive system 3 allocated to each transformer 20 are connected to a central and single control unit 10 via a bus 19. The central control unit 10 coordinates and controls the operation of the corresponding on-load tap changer 17 or bidirectional commutator 18 for each of the three transformers 20. (As in...) Figures 1 to 3 As shown, the power unit 11 acts on motors 12 and 13, which are respectively matched with on-load tap changer 17 and bidirectional commutator 18, to operate the motors.

[0048] Figure 5The method flow according to the invention is illustrated. Here, control device 2 receives switching signals for operating the on-load tap changer 17 and / or the bidirectional commutator 18. The switching signals can be generated, for example, by manual input during maintenance work. Alternatively, the switching signals can also be provided by means of voltage regulation, for example, when the voltage on transformer 20 decreases or increases. After receiving the switching signals, control unit 10 retrieves at least one parameter. Figure 1 In the example, the retrieved parameter is the position of the bidirectional commutator 18, i.e., the second switching device 18, determined by the feedback system 6 subordinate to the first motor 12. In the control unit 10, at least one latching condition is stored in the memory 5, which may or may not be satisfied by the at least one parameter. If the latching condition is satisfied during a check, the on-load tap changer 17 is switched by means of the first motor 12 paired with the on-load tap changer. If the latching condition is not satisfied during a check, for example, operation of the on-load tap changer 17 can be stopped; therefore, no switching is performed. Furthermore, a fault report may be generated. However, in an emergency, connection may be performed even if the latching condition is not satisfied. Thus, the control unit 10 may wait until the parameters satisfy the latching condition and then perform the switching. Alternatively, switching may be stopped before it begins. Figure 1 Starting with the example in the example, before operating the on-load tap changer 17, it is first checked which state (position) the bidirectional commutator 18 is in and / or whether the bidirectional commutator is just moving, i.e., just being operated. According to the locking condition in this example, the on-load tap changer 17 is not allowed to be operated when the bidirectional commutator 18 is just being operated or, for example, in an unsuitable / disallowed state (position). The parameters required for checking the locking condition are provided by the second feedback system 17 of the second motor 13 of the bidirectional commutator 18. Here, the feedback system 6 or 7 is configured, for example, as a multi-turn encoder, which is directly or indirectly connected to the drive shaft 16 arranged between the second motor 13 and the bidirectional commutator 18. Thus, the multi-turn encoder determines the parameters, for example, the position of the bidirectional commutator 18, based on the position of the drive shaft 16. The first feedback system 6 of the on-load tap changer 17 is similarly designed.

[0049] According to the design scheme of drive system 3, different parameters can be combined with different locking conditions. Therefore, as in Figure 3 As in the embodiment described above, the positions (states) of the two bidirectional commutators 18 are checked before operating the on-load tap changer 17. Alternatively, before operating the second bidirectional commutator 18, the locking conditions are checked, i.e., the parameters of the on-load tap changer 17 and the first bidirectional commutator 18 are checked. Here, these parameters are also retrieved through the corresponding feedback systems 6 and 7 configured as multi-turn encoders.

[0050] The parameters to be retrieved can be determined in any way or in any form. These parameters can be determined from feedback systems 6 and 7 on the motors 12 and 13 of the corresponding on-load tap changer 17 and the corresponding bidirectional commutator 18, which can be simple safety switches of the transformer 20 or even customer-specific release buttons. Furthermore, feedback systems 6 and 7 can be part of a control unit 10 that provides the parameters to be retrieved for locking conditions, either for connection counting or stop time.

[0051] Feedback systems 6 and 7 are directly or indirectly connected to drive shaft 16, which is respectively arranged between the corresponding motor 12 and the on-load tap changer 17 and between the corresponding motor 13 and the bidirectional commutator 18. The position of drive shaft 16 determines the parameters used for the on-load tap changer 17 and the bidirectional commutator 18, such as tap position and movement.

[0052] The locking condition defines the state that must be met for the switching to be "locked" (i.e., blocked). This condition is related to parameters that are formed or defined by the state or position, current condition or motion state of the on-load tap changer 17 or the bidirectional commutator 18.

[0053] The locking condition can use one or more parameters of one or more feedback systems 6 and 7.

[0054] The parameters include, for example, the motion state of the on-load tap changer 17 or the bidirectional commutator 18, the position or state of the on-load tap changer 17 or the bidirectional commutator 18, the position range or state range of the on-load tap changer 17 or the bidirectional commutator 18, temperature, customer-specific switching signals, safety devices, and the like.

[0055] List of reference numerals

[0056] 2 Control device

[0057] 3 drive system

[0058] 5. Memory

[0059] 6 First Feedback System

[0060] 7 Second Feedback System

[0061] 10 control units

[0062] 11 power components

[0063] 12 First Motor

[0064] 13 Second Motor

[0065] 16 drive shafts

[0066] 17 On-load tap changer, first switching device

[0067] 18 bidirectional commutators, second switching equipment

[0068] 19 bus

[0069] 20 transformers

[0070] 30 First Switching Equipment Group

[0071] 40 Second Switching Equipment Group

[0072] 50 Third Switching Equipment Group

Claims

1. A method for switching at least one switching device (17, 18) of at least one operating device (20), wherein, The operating equipment (20) are all transformers, and the switching equipment are all on-load tap changers or bidirectional commutators, characterized by the following steps: - The control unit (10) receives the switching signal, - The control unit (10) selects at least one switching device (17, 18) for switching based on the switching signal; - Check the corresponding interlocking conditions for the selected at least one switching device (17, 18) according to at least one parameter; and - When the corresponding locking condition is met, the switching is performed by means of the corresponding motor (12, 13) of the selected at least one switching device (17, 18). Wherein, the at least one parameter includes the position and / or motion state of the selected at least one switching device (17, 18), and The corresponding interlocking conditions related to the position and / or motion state of the selected at least one switching device (17, 18) define whether the corresponding switching is locked, so that the switching can occur when the interlocking conditions are met, thereby improving the safety of the switching device and the operating device during the switching process.

2. The method as described in claim 1, wherein, In the control unit (10), multiple parameters for the selected at least one switching device (17, 18) are evaluated, and the multiple parameters include one or more temperatures, customer-specific switching signals, and the status of power switches or safety devices.

3. The method as described in claim 1 or 2, wherein, The control unit (10) retrieves at least one parameter from the feedback system (6, 7), which is matched with the first motor (12) of the first switching device and / or with the second motor (13) of at least the second switching device.

4. The method of claim 3, wherein, The feedback system (6, 7) is matched with the drive shaft (16) for the first motor (12) or with the drive shaft (16) for the second motor (13).

5. The method of claim 4, wherein, The control unit (10) operates the power component (11) that is matched with at least one of the operating devices (20) to operate the selected at least one switching device (17, 18), and the power component (11) operates the corresponding switching device (17, 18) via the corresponding drive shaft (16) using the corresponding motor (12, 13) according to the obtained locking conditions.

6. The method as described in claim 1 or 2, wherein, Three operating devices (20) are set up, and each of the three operating devices (20) is equipped with a power component (11), and each power component (11) is controlled by a control unit (10). The on-load tap changers of the three operating devices (20) are combined to form a first switching device group (30), the first bidirectional commutators of the three operating devices (20) are combined to form a second switching device group (40), and the second bidirectional commutators of the three operating devices (20) are combined to form a third switching device group (50).

7. The method as described in claim 1 or 2, wherein, The transformer (20) is equipped with three on-load tap switches as switching devices. In order to perform the switching, the control unit (10) controls the power component (11) matched with the transformer (20) to operate one of the three on-load tap switches, and the power component (11) operates the motor (12) of the corresponding on-load tap switch through the drive shaft (16) according to the execution of the switching.

8. The method as claimed in claim 1 or 2, wherein, The transformer (20) is assigned an on-load tap changer as a first switching device and a bidirectional commutator as a second switching device and a third switching device, wherein, in order to perform the switching, the control unit (10) operates the power component (11) matched with the transformer (20) to operate the on-load tap changer and at least one of the two bidirectional commutators, and the power component (11) operates the first motor (12) connected to the on-load tap changer via the drive shaft (16) and the second motor (13) connected to one of the two bidirectional commutators via the drive shaft (16) according to the execution of the switching.

9. A drive system (3) for at least one switching device (17, 18) of an operating device (20), wherein, The operating equipment (20) is a transformer, and the switching equipment is either an on-load tap changer or a bidirectional commutator, characterized in that: - A first motor (12), which is mechanically connected to a first switching device in at least one switching device of the operating device (20) via a drive shaft (16); - Control unit (10), which is communicatively connected to power component (11) to operate the first switching device of the at least one switching device using the first motor (12), provided that the latching condition checked by the control unit (10) based on at least one obtained parameter is met. Wherein, the at least one parameter includes the position and / or motion state of the at least one switching device (17, 18), and The corresponding interlocking conditions related to the position and / or motion state of the selected at least one switching device (17, 18) define whether the corresponding switching is locked, so that the switching can occur when the interlocking conditions are met, thereby improving the safety of the switching device and the operating device during the switching process.

10. The drive system (3) as claimed in claim 9, wherein, The drive system is equipped with two switching devices (17, 18) for operating the device (20), and the drive system (3) further includes: - Second switching device; - A second motor (13), which is mechanically connected to a second switching device via a drive shaft (16); - The control unit (10) is communicatively connected to the power unit (11) to operate the second switching device using the second motor (13), provided that the locking condition checked by the control unit (10) based on the at least one parameter obtained is satisfied.

11. The drive system (3) as claimed in claim 10, wherein, A feedback system (6, 7) is provided for the first motor (12) and the second motor (13) respectively, so as to obtain at least one parameter of the first switching device and at least one parameter of the second switching device.

12. The drive system (3) as claimed in claim 11, wherein, The feedback system (6, 7) is matched with the drive shaft (16) for the first motor (12) or with the drive shaft (16) for the second motor (13).

13. The drive system (3) as described in any one of claims 9 to 12, wherein, The drive system (3) is configured for three operating devices (20), each operating device (20) is assigned a power unit (11), and each power unit (11) is connected to a single control unit (10) via a bus (19). The on-load tap changers of the operating devices (20) are combined to form a first switching device group (30), the first bidirectional commutators of the operating devices (20) are combined to form a second switching device group (40), and the second bidirectional commutators of the operating devices (20) are combined to form a third switching device group (50).

14. The drive system (3) as claimed in claim 9, wherein, Three on-load tap changers are provided for the transformer (20).

15. The drive system (3) as claimed in claim 9, wherein, The transformer (20) is equipped with a single on-load tap changer and two bidirectional commutators.

16. The drive system (3) as claimed in claim 13, wherein, The control unit (10) and / or the power unit (11) include a memory (5).

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